Both
barrels fire simultaneously and spread apart some 3
or 4 inches per foot fired (ie; when firing at a line
of fencers 8 feet away, you have a good chance of hitting
two separate targets standing three feet apart). This
hefty pistol is 17 inches long, and is based upon museum
photos of a French pistol of the period.

To
the right you can see another view of this pistol which
better shows its two barrels.